State True or False: “In a Python program, if a break statement is given in a nested loop, it terminates the execution of all loops in one go.”

Solution

In a table in MYSQL database, an attribute A of datatype varchar(20) has the value “Keshav”. The attribute B of datatype char(20) has value “Meenakshi”. How many characters are occupied by attribute A and attribute B?
a. 20,6 b. 6,20
c. 9,6 d. 6,9

Solution

What will be the output of the following statement:
print(3-2**2**3+99/11)
a. 244 b. 244.0
c. -244.0 d. Error

Solution

Select the correct output of the code:

Options:
a. PYTHON-IS-Fun
b. PYTHON-is-Fun
c. Python-is-fun
d. PYTHON-Is -Fun

Solution

In MYSQL database, if a table, Alpha has degree 5 and cardinality 3, and another table, Beta has degree 3 and cardinality 5, what will be the degree and cardinality of the Cartesian product of Alpha and Beta?
a. 5,3 b. 8,15
c. 3,5 d. 15,8

Solution

Riya wants to transfer pictures from her mobile phone to her laptop. She uses Bluetooth Technology to connect two devices. Which type of network will be formed in this case?
a. PAN b. LAN
c. MAN d. WAN

Solution

Which of the following will delete key-value pair for key = “Red” from a dictionary D1?
a. delete D1("Red")
b. del D1["Red"]
c. del.D1["Red"]
d. D1.del["Red"]

Solution

Consider the statements given below and then choose the correct output from the given options:
pride="#G20 Presidency"
print(pride[-2:2:-2])
Options:
a. ndsr
b. ceieP0
c. ceieP
d. yndsr

Solution

Which of the following statement(s) would give an error during execution of the following code?
tup = (20,30,40,50,80,79)
print(tup) #Statement 1
print(tup[3]+50) #Statement 2
print(max(tup)) #Statement 3
tup[4]=80 #Statement 4

Options:
a. Statement 1
b. Statement 2
c. Statement 3
d. Statement 4

Solution

What possible outputs(s) will be obtained when the following code is executed?

Options: a.
RED*
WHITE*
BLACK*

b.
WHITE*
BLACK*

c.
WHITE* WHITE*
BLACK* BLACK*

d.
YELLOW*
WHITE*WHITE*
BLACK* BLACK* BLACK*

Solution

Fill in the blank:
The modem at the sender’s computer end acts as a ____________.
a. Model
b. Modulator
c. Demodulator
d. Convertor

Solution

Consider the code given below:

Which of the following statements should be given in the blank for #Missing Statement, if the output produced is 110?
Options:
a. global a
b. global b=100
c. global b
d. global a=100

Solution

State whether the following statement is True or False:
An exception may be raised even if the program is syntactically correct.

Solution

Which of the following statements is FALSE about keys in a relational database?
a. Any candidate key is eligible to become a primary key.
b. A primary key uniquely identifies the tuples in a relation.
c. A candidate key that is not a primary key is a foreign key.
d. A foreign key is an attribute whose value is derived from the primary key of another relation

Solution

Fill in the blank:
In case of _____________ switching, before a communication starts, a dedicated path is identified between the sender and the receiver.

Solution

Which of the following functions changes the position of file pointer and returns its new position?
a.flush()
b.tell()
c.seek()
d.offset()

Solution

Q17 and 18 are ASSERTION AND REASONING based questions. Mark the correct choice as
(a) Both A and R are true and R is the correct explanation for A
(b) Both A and R are true and R is not the correct explanation for A
(c) A is True but R is False
(d) A is false but R is True

Assertion(A): List is an immutable data type
Reasoning(R): When an attempt is made to update the value of an immutable variable, the old variable is destroyed and a new variable is created by the same name in memory.

Solution

Assertion(A): Python Standard Library consists of various modules.
Reasoning(R): A function in a module is used to simplify the code and avoids repetition

Solution

(i) Expand the following terms:
POP3 , URL
(ii) Give one difference between XML and HTML.
OR
(i) Define the term bandwidth with respect to networks.
(ii) How is http different from https?

Solution

The code given below accepts a number as an argument and returns the reverse number. Observe the following code carefully and rewrite it after removing all syntax and logical errors. Underline all the corrections made.

Solution

def revNumber(num):
  rev = 0
  rem = 0
  while num > 0:
     rem =num %10
     rev = rev*10 + rem
     num = num//10
  return rev
print(revNumber(1234))
           

Write a function countNow(PLACES) in Python, that takes the dictionary, PLACES as an argument and displays the names (in uppercase)of the places whose names are longer than 5 characters.
For example, Consider the following dictionary
PLACES={1:"Delhi",2:"London",3:"Paris",4:"New
York",5:"Doha"}
The output should be:
LONDON
NEW YORK
OR
Write a function, lenWords(STRING), that takes a string as an argument
and returns a tuple containing length of each word of a string.
For example, if the string is "Come let us have some fun", the
tuple will have (4, 3, 2, 4, 4, 3)

Solution

OR

Predict the output of the following code:

Solution

Write the Python statement for each of the following tasks using BUILT-IN functions/methods only:
(i) To insert an element 200 at the third position, in the list L1.
(ii) To check whether a string named, message ends with a full stop / period or not.
OR
A list named studentAge stores age of students of a class. Write the Python command to import the required module and (using built-in function) to display the most common age value from the given list.

Solution

Ms. Shalini has just created a table named “Employee” containing columns Ename, Department and Salary.
After creating the table, she realized that she has forgotten to add a primary key column in the table. Help her in writing an SQL command to add a primary key column EmpId of integer type to the table Employee. Thereafter, write the command to insert the following record in the table:
EmpId- 999 Ename- Shweta Department: Production Salary: 26900
OR
Zack is working in a database named SPORT, in which he has created a table named “Sports” containing columns SportId, SportName, no_of_players, and category.
After creating the table, he realized that the attribute, category has to be deleted from the table and a new attribute TypeSport of data type string has to be added. This attribute TypeSport cannot be left blank. Help Zack write the commands to complete both the tasks.

Solution

SQL Command to add primary key:

ALTER TABLE Employee ADD EmpId INTEGER
PRIMARY KEY;

As the primary key is added as the last field, the command for
inserting data will be:

INSERT INTO
Employee(EmpId,Ename,Department,Salary)
VALUES(999,"Shweta","Production",26900);

 OR

To delete the attribute, category:

ALTER TABLE Sports
DROP category;

To add the attribute, TypeSport
ALTER TABLE Sports
ADD TypeSport char(10) NOT NULL;
                

Predict the output of the following code:

Solution

Predict the output of the Python code given below:

 Text1="IND-23"
 Text2=""
 I=0
 while I< len(Text1):
     if Text1[I]>="0" and Text1[I]<="9":
         val=int(Text1[I])
         val=val+1
         Text2=Text2+str(val)
     elif Text1[I]>="A" and Text1[I]<= "Z":
         Text2=Text2+(Text1[I+1])
     else: 
         Text2=Text2+"*"
     I+=1
 print(Text2)
                 

Solution

Consider the table CLUB given below and write the output of the SQL queries that follow.



(i) SELECT COUNT(DISTINCT SPORTS) FROM CLUB;
(ii) SELECT CNAME, SPORTS FROM CLUB WHERE DOAPP<"2006-04-30" AND CNAME LIKE "%NA" ;
(iii) SELECT CNAME, AGE, PAY FROM CLUB WHERE GENDER = "MALE" AND PAY BETWEEN 1000 AND 1200;

Solution

Write a function in Python to read a text file, Alpha.txt and displays those lines which begin with the word ‘You’.

OR

Write a function, vowelCount() in Python that counts and displays the number of vowels in the text file named Poem.txt.

Solution

     def test():
         fobjl = open ("Alpha.txt","r")
         data = fObjl.readlines ()
     
         for line in data:
             L=line.split()
             if L[0]=="You":
                     print (line) 
         fobjl.close()
     

Consider the table Personal given below:

Table: Personal



Based on the given table, write SQL queries for the following:

(i) Increase the salary by 5% of personals whose allowance is known.
(ii) Display Name and Total Salary (sum of Salary and Allowance) of all personals. The column heading ‘Total Salary’ should also be displayed.
(iii) Delete the record of personals who have salary greater than 25000

Solution

A list, NList contains following record as list elements:

[City, Country, distance from Delhi]

Each of these records are nested together to form a nested list. Write the following user defined functions in Python to perform the specified operations on the stack named travel.

(i) Push_element(NList): It takes the nested list as an argument and pushes a list object containing name of the city and country, which are not in India and distance is less than 3500 km from Delhi.
(ii) Pop_element(): It pops the objects from the stack and displays them. Also, the function should display “Stack Empty” when there are no elements in the stack.

For example: If the nested list contains the following data:
NList=[["New York", "U.S.A.", 11734],
["Naypyidaw", "Myanmar", 3219],
["Dubai", "UAE", 2194],
["London", "England", 6693],
["Gangtok", "India", 1580],
["Columbo", "Sri Lanka", 3405]]

The stack should contain:

['Naypyidaw', 'Myanmar'],
['Dubai', 'UAE'],
['Columbo', 'Sri Lanka']

The output should be:

['Columbo', 'Sri Lanka']
['Dubai', 'UAE']
['Naypyidaw', 'Myanmar']

Stack Empty

Solution

 travel=[]
 def Push_element(NList):
         for L in NList:
             if L[i]!="India" and L[2]< 3500:
                     travel.append([L[0],l[1]])
 
 def Pop_element():
         while len(travel):
             print(travel.pop())
         else:
             print("Stack Empty")
 

Consider the tables PRODUCT and BRAND given below:

Table: PRODUCT





Table: PRODUCT



Write SQL queries for the following:

(i) Display product name and brand name from the tables PRODUCT and BRAND.
(ii) Display the structure of the table PRODUCT.
(iii) Display the average rating of Medimix and Dove brands
(iv) Display the name, price, and rating of products in descending order of rating

Solution

Vedansh is a Python programmer working in a school. For the Annual Sports Event, he has created a csv file named Result.csv, to store the results of students in different sports events. The structure of Result.csv is :

[St_Id, St_Name, Game_Name, Result]

Where

St_Id is Student ID (integer)
ST_name is Student Name (string)

Game_Name is name of game in which student is participating(string) Result is result of the game whose value can be either 'Won', 'Lost' or 'Tie'

For efficiently maintaining data of the event, Vedansh wants to write the following user defined functions:

Accept() – to accept a record from the user and add it to the file Result.csv. The column headings should also be added on top of the csv file.

wonCount() – to count the number of students who have won any event. As a Python expert, help him complete the task.

Solution

 def Accept():
 sid=int (input ("Enter Student ID "))
 sname=input ("Enter Student Name ")
 game=input ("Enter name of game ")
 res=input ("Enter Result")
 headings=["Student ID", "Student Name"," Game Name", "Result"]
 data=[sid, sname, game, res]
 f=open('Result.csv', 'a', newlie='')
 csvwriter=csv.writer(f)
 csvwriter.writerow(headings)
 csvwriter.writerow(data)
 f.close()
 
 def wonCount():
     f=open('Result.csv', 'r')
     csvreader=csv.reader (f,delimiter=',')
     head=list(csvreader)
     print(head[0])
     for x in head:
             if x[3]=="WON":
                 print(x)
     f.close()
           
 

Meticulous EduServe is an educational organization. It is planning to setup its India campus at Chennai with its head office at Delhi. The Chennai campus has 4 main buildings – ADMIN, ENGINEERING, BUSINESS and MEDIA



Block to Block distances (in Mtrs.)



Number of computers in each of the blocks/Center is as follows:



a) Suggest and draw the cable layout to efficiently connect various blocks of buildings within the CHENNAI campus for connecting the digital devices

b) Which network device will be used to connect computers in each block to form a local area network?

c) Which block, in Chennai Campus should be made the server? Justify your answer.

d) Which fast and very effective wireless transmission medium should preferably be used to connect the head office at DELHI with the campus in CHENNAI?

e) Is there a requirement of a repeater in the given cable layout? Why/ Why not?

Solution

b) Switch

c) Admin block, as it has maximum number of computers.

d) Microwave

e) No, a repeater is not required in the given cable layout as the length of transmission medium between any two blocks does not exceed 70 m.

(i) Differentiate between r+ and w+ file modes in Python.

(ii) Consider a file, SPORT.DAT, containing records of the following structure:

[SportName, TeamName, No_Players]

Write a function, copyData(), that reads contents from the file SPORT.DAT and copies the records with Sport name as “Basket Ball” to the file named BASKET.DAT. The function should return the total number of records copied to the file BASKET.DAT.

OR

(i) How are text files different from binary files?
(ii) A Binary file, CINEMA.DAT has the following structure:

{MNO:[MNAME, MTYPE]}

Where

MNO – Movie Number
MNAME – Movie Name
MTYPE is Movie Type

Write a user defined function, findType(mtype), that accepts mtype as parameter and displays all the records from the binary file CINEMA.DAT, that have the value of Movie Type as mtype.

Solution

 def copyData():
 fObj = open("SPORT.DAT", "rb")
 fobj1 open ("BASKET.DAT", "wb")
 cnt=0
 try:
         while True:
             data=pickle.load(fobj)
             print (data)
             if data[0] "Basket Ball":
                     pickle.dump (data, f0bj1)
                     cnt+=1
 except:
         fObj.close()
         fObjl.close()
 return cnt
 

 def Searchtype(mtype):
    fobj=open("CINEMA.DAT","rb")
    try:
        while True:
            data=pickle.load(fobj)
            if data[2]==mtype:
                print("Movie number:",data[0])
                print("Movie name:",data[1])
                print("Movie Type:",data[2])
    except:
        fobj.close()
     

(i) Define the term Domain with respect to RDBMS. Give one example to support your answer

(ii) Kabir wants to write a program in Python to insert the following record in the table named Student in MYSQL database, SCHOOL:

• rno(Roll number )- integer
• name(Name) - string
• DOB (Date of birth) – Date
• Fee – float

Note the following to establish connectivity between Python and MySQL:

• Username - root
• Password - tiger
• Host - localhost
The values of fields rno, name, DOB and fee has to be accepted from the user. Help Kabir to write the program in Python.

OR

(i) Give one difference between alternate key and candidate key.
(ii) Sartaj has created a table named Student in MYSQL database, SCHOOL:

• rno(Roll number )- integer
• name(Name) - string
• DOB (Date of birth) – Date
• Fee – float

Note the following to establish connectivity between Python and MySQL:

• Username - root
• Password - tiger
• Host - localhost

Sartaj, now wants to display the records of students whose fee is more than 5000. Help Sartaj to write the program in Python.

Solution

 import mysql.connector as mysql
 
 colmysql.connect(host-"localhost",user="root", password-"tiger", database="sample2023")
 mycursor-conl.cursor()
 rno= int(input ("Enter Roll Number:: "))
 name = input ("Enter the name:: ")
 DOB= input ("Enter date of birth:: ")
 fee= float(input("Enter Fee:: "))
 query= "INSERT into student values ({},'{}','{}',{}))". format (rno, name, DOB, fee)
 cursor.execute(query)
 conl.commit()
 print("ata added successfully")
 cul.close()
 

 

 import mysql.connector as mysql
 con1= mysql.connect(host="localhost", user="root", password="tiger", database="23")
 
 mycursor=con1.cursor()
 
 query= "SELECT FROM student where fee>{}".format(5000)
 mycursor.execute(query)
 data=mycursor.fetchall()
 for rec in data:
         print(rec)
 con1.close()